/* 图表容器样式 */
.chart-container {
  width: 100%;
  min-width: 350px;
  background: #ffffff;
  border-radius: 8px;
  overflow: hidden;
}

/* 图表占位符 */
.chart-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  background: #f8f9fa;
  border: 2px dashed #e8eaed;
  border-radius: 8px;
  color: #5f6368;
}

.placeholder-icon {
  font-size: 32px;
  margin-bottom: 8px;
}

.placeholder-text {
  font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .chart-container {
    min-width: 280px;
  }
  
  .chart-placeholder {
    height: 150px;
  }
  
  .placeholder-icon {
    font-size: 24px;
  }
  
  .placeholder-text {
    font-size: 12px;
  }
}
